quickstep/src/com/android/launcher3/uioverrides/DisplayRotationListener.java


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/*
 * Copyright (C) 2018 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.android.launcher3.uioverrides;

import android.content.Context;
import android.os.Handler;

import com.android.systemui.shared.system.RotationWatcher;

/**
 * Utility class for listening for rotation changes
 */
public class DisplayRotationListener extends RotationWatcher {

    private final Runnable mCallback;
    private Handler mHandler;

    public DisplayRotationListener(Context context, Runnable callback) {
        super(context);
        mCallback = callback;
    }

    @Override
    public void enable() {
        if (mHandler == null) {
            mHandler = new Handler();
        }
        super.enable();
    }

    @Override
    protected void onRotationChanged(int i) {
        mHandler.post(mCallback);
    }
}